<?php

/**
 * Yii Requirement Checker script
 *
 * This script will check if your system meets the requirements for running
 * Yii-powered Web applications.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2011 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 * @version $Id: index.php 3243 2011-05-28 22:32:30Z alexander.makarow $
 * @package system
 * @since 1.0
 */
/**
 * @var array List of requirements (name, required or not, result, used by, memo)
 */
$requirements=array(
array(
t('yii','PHP version'),
true,
version_compare(PHP_VERSION,"5.1.0",">="),
		'<a href="http://www.yiiframework.com">Yii Framework</a>',
t('yii','PHP 5.1.0 or higher is required.')),
array(
t('yii','$_SERVER variable'),
true,
($message=checkServerVar()) === '',
		'<a href="http://www.yiiframework.com">Yii Framework</a>',
$message),
array(
t('yii','Reflection extension'),
true,
class_exists('Reflection',false),
		'<a href="http://www.yiiframework.com">Yii Framework</a>',
		''),
array(
t('yii','PCRE extension'),
true,
extension_loaded("pcre"),
		'<a href="http://www.yiiframework.com">Yii Framework</a>',
		''),
array(
t('yii','SPL extension'),
true,
extension_loaded("SPL"),
		'<a href="http://www.yiiframework.com">Yii Framework</a>',
		''),
array(
t('yii','DOM extension'),
false,
class_exists("DOMDocument",false),
		'<a href="http://www.yiiframework.com/doc/api/CHtmlPurifier">CHtmlPurifier</a>, <a href="http://www.yiiframework.com/doc/api/CWsdlGenerator">CWsdlGenerator</a>',
		''),
array(
t('yii','PDO extension'),
false,
extension_loaded('pdo'),
t('yii','All <a href="http://www.yiiframework.com/doc/api/#system.db">DB-related classes</a>'),
		''),
array(
t('yii','PDO SQLite extension'),
false,
extension_loaded('pdo_sqlite'),
t('yii','All <a href="http://www.yiiframework.com/doc/api/#system.db">DB-related classes</a>'),
t('yii','This is required if you are using SQLite database.')),
array(
t('yii','PDO MySQL extension'),
false,
extension_loaded('pdo_mysql'),
t('yii','All <a href="http://www.yiiframework.com/doc/api/#system.db">DB-related classes</a>'),
t('yii','This is required if you are using MySQL database.')),
array(
t('yii','PDO PostgreSQL extension'),
false,
extension_loaded('pdo_pgsql'),
t('yii','All <a href="http://www.yiiframework.com/doc/api/#system.db">DB-related classes</a>'),
t('yii','This is required if you are using PostgreSQL database.')),
array(
t('yii','Memcache extension'),
false,
extension_loaded("memcache") || extension_loaded("memcached"),
		'<a href="http://www.yiiframework.com/doc/api/CMemCache">CMemCache</a>',
extension_loaded("memcached") ? t('yii', 'To use memcached set <a href="http://www.yiiframework.com/doc/api/CMemCache#useMemcached-detail">CMemCache::useMemcached</a> to <code>true</code>.') : ''),
array(
t('yii','APC extension'),
false,
extension_loaded("apc"),
		'<a href="http://www.yiiframework.com/doc/api/CApcCache">CApcCache</a>',
		''),
array(
t('yii','Mcrypt extension'),
false,
extension_loaded("mcrypt"),
		'<a href="http://www.yiiframework.com/doc/api/CSecurityManager">CSecurityManager</a>',
t('yii','This is required by encrypt and decrypt methods.')),
array(
t('yii','SOAP extension'),
false,
extension_loaded("soap"),
		'<a href="http://www.yiiframework.com/doc/api/CWebService">CWebService</a>, <a href="http://www.yiiframework.com/doc/api/CWebServiceAction">CWebServiceAction</a>',
		''),
array(
t('yii','GD extension with<br />FreeType support'),
false,
($message=checkGD()) === '',
//extension_loaded('gd'),
		'<a href="http://www.yiiframework.com/doc/api/CCaptchaAction">CCaptchaAction</a>',
$message),
array(
t('yii','Ctype extension'),
false,
extension_loaded("ctype"),
		'<a href="http://www.yiiframework.com/doc/api/CDateFormatter">CDateFormatter</a>, <a href="http://www.yiiframework.com/doc/api/CDateFormatter">CDateTimeParser</a>, <a href="http://www.yiiframework.com/doc/api/CTextHighlighter">CTextHighlighter</a>, <a href="http://www.yiiframework.com/doc/api/CHtmlPurifier">CHtmlPurifier</a>',
		''
		)
		);

		function checkServerVar()
		{
		    $vars=array('HTTP_HOST','SERVER_NAME','SERVER_PORT','SCRIPT_NAME','SCRIPT_FILENAME','PHP_SELF','HTTP_ACCEPT','HTTP_USER_AGENT');
		    $missing=array();
		    foreach($vars as $var)
		    {
		        if(!isset($_SERVER[$var]))
		        $missing[]=$var;
		    }
		    if(!empty($missing))
		    return t('yii','$_SERVER does not have {vars}.',array('{vars}'=>implode(', ',$missing)));

		    if(realpath($_SERVER["SCRIPT_FILENAME"]) !== realpath(__FILE__))
		    return t('yii','$_SERVER["SCRIPT_FILENAME"] must be the same as the entry script file path.');

		    if(!isset($_SERVER["REQUEST_URI"]) && isset($_SERVER["QUERY_STRING"]))
		    return t('yii','Either $_SERVER["REQUEST_URI"] or $_SERVER["QUERY_STRING"] must exist.');

		    if(!isset($_SERVER["PATH_INFO"]) && strpos($_SERVER["PHP_SELF"],$_SERVER["SCRIPT_NAME"]) !== 0)
		    return t('yii','Unable to determine URL path info. Please make sure $_SERVER["PATH_INFO"] (or $_SERVER["PHP_SELF"] and $_SERVER["SCRIPT_NAME"]) contains proper value.');

		    return '';
		}

		function checkGD()
		{
		    if(extension_loaded('gd'))
		    {
		        $gdinfo=gd_info();
		        if($gdinfo['FreeType Support'])
		        return '';
		        return t('yii','GD installed<br />FreeType support not installed');
		    }
		    return t('yii','GD not installed');
		}

		function getYiiVersion()
		{
		    $coreFile=dirname(__FILE__).'/../framework/YiiBase.php';
		    if(is_file($coreFile))
		    {
		        $contents=file_get_contents($coreFile);
		        $matches=array();
		        if(preg_match('/public static function getVersion.*?return \'(.*?)\'/ms',$contents,$matches) > 0)
		        return $matches[1];
		    }
		    return '';
		}

		/**
		 * Returns a localized message according to user preferred language.
		 * @param string message category
		 * @param string message to be translated
		 * @param array parameters to be applied to the translated message
		 * @return string translated message
		 */
		function t($category,$message,$params=array())
		{
		    static $messages;

		    if($messages === null)
		    {
		        $messages=array();
		        if(($lang=getPreferredLanguage()) !== false)
		        {
		            $file=dirname(__FILE__)."/messages/$lang/yii.php";
		            if(is_file($file))
		            $messages=include($file);
		        }
		    }

		    if(empty($message))
		    return $message;

		    if(isset($messages[$message]) && $messages[$message] !== '')
		    $message=$messages[$message];

		    return $params !== array() ? strtr($message,$params) : $message;
		}

		function getPreferredLanguage()
		{
		    if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) && ($n=preg_match_all('/([\w\-]+)\s*(;\s*q\s*=\s*(\d*\.\d*))?/',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches)) > 0)
		    {
		        $languages=array();
		        for($i=0; $i < $n; ++$i)
		        $languages[$matches[1][$i]]=empty($matches[3][$i]) ? 1.0 : floatval($matches[3][$i]);
		        arsort($languages);
		        foreach($languages as $language=>$pref)
		        return strtolower(str_replace('-','_',$language));
		    }
		    return false;
		}

		function getServerInfo()
		{
		    $info[]=isset($_SERVER['SERVER_SOFTWARE']) ? $_SERVER['SERVER_SOFTWARE'] : '';
		    $info[]='<a href="http://www.yiiframework.com/">Yii Framework</a>/'.getYiiVersion();
		    $info[]=@strftime('%Y-%m-%d %H:%M',time());

		    return implode(' ',$info);
		}

		function renderFile($_file_,$_params_=array())
		{
		    extract($_params_);
		    require($_file_);
		}

		$result=1;  // 1: all pass, 0: fail, -1: pass with warnings

		foreach($requirements as $i=>$requirement)
		{
		    if($requirement[1] && !$requirement[2])
		    $result=0;
		    else if($result > 0 && !$requirement[1] && !$requirement[2])
		    $result=-1;
		    if($requirement[4] === '')
		    $requirements[$i][4]='&nbsp;';
		}

		$lang=getPreferredLanguage();
		$viewFile=dirname(__FILE__)."/views/$lang/index.php";
		if(!is_file($viewFile))
		$viewFile=dirname(__FILE__).'/views/index.php';

		renderFile($viewFile,array(
	'requirements'=>$requirements,
	'result'=>$result,
	'serverInfo'=>getServerInfo()));

